Means for producing metallic floor-plates



No. 750,042. PATENTED JAN. 19, 1904.

- M. G. WORTH.

MEANS FOR PRODUCING METALLIC FLOOR PLATES.

IIIIIIIIIIIIIIIII 0T. 222222 3.

[/VVENTO Afforney on Pmmumo m magma u L UNITED STATES Patented January 19, 1904.

PATENT OFFICE.

MEANS FOR PRODUCING METALLIC FLOOR-PLATES.

SPECIFICATION forming part of Letters Patent No. 750,042, dated January 19, 1904.

Application filed October 27, 1905 To all whom it may concern:

Be it known that I, MASON Gr. WORTH, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Means for Producing Metallic Floor-Plates, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to means for producing metallic floor-plates having projections upon their wearing-surfaces, and has for an object to provide means for forming such projections of regular shape and size, so that a uniformappearance is produced upon a floor composed of a plurality of such plates. The means employed are adapted to first form a series of ribs upon the plate extending diagonally to the side edges thereof by the primary operation and to depress or remove a portion of said ribs by a secondary operation, so as to leave a series of regular separated projections upon the wearing-face of the plate. 7

Heretofore in the art it has been customary to use a grooved roll, the plate being passed in contact therewith at different angles to produce the projections, and it was consequently impossible to provide a plurality of plates having projections of uniform shape and size,

as a longer plate would necessarily have to be entered upon the roll at a different angle from a shorter one, so that a floor made up of such plates did not have a uniform appearance.

In the drawings, Figure 1 is an elevation showing one form of means for carrying the invention into effect. Fig. 2 is a plan of a plate provided with ribs produced by the primary operation and indicating the secondary operation by dotted lines. Fig. 3 is a similar view of the plate after the secondary operation, having the completed projections upon its wearing-face; Fig. 4: is a vertical section through the plate on the line 4 4 of Fig. 3, and Fig. 5 is a detail perspective of a modified means for producing the same efiect as by the means in Fig. 1.

Like letters of reference refer to like parts in the several figures of the drawings.

The means shown in Fig. 1 for producing floor-plates (shown in Fig. 3) comprise a three- Serial No. 178,775. (No model.)

roll mill, the rolls A and C being grooved at an acute angle to their axes of rotation and in opposite directions to each other, while the intermediate roll B is smooth or plain. The means carried by the rolls A and C for producing the ribs D upon the plate D may be of any desired characterfor instance, the ribs A and C, (shown in Fig. 1,) by which the body of the plate is depressed at opposite sides of the rib D thereof, thus forming intermediate grooves D between the adjacent ribs. It is desirable, however, that the ribs comprising the actual thickness of the plate before the rolling operation, while the body of the plate is depressed surrounding the ribsfor instance, a plate three-eighths of an inch thick would be depressed or thinned to one-fourth of an inch except where the ribs are located, which would remain at three-eighths of an inch, so that the ribs are produced by the compression of the plate at opposite sides of the ribs thereon. The dimensions given here are merely cited as an instance for the purpose of illustration and not intended as a limitation to the size or thickness in any instance.

In the use of the form of the invention shown in Fig.1 the plate Dis passed between the rolls A and B, so that the ribs and inter mediate grooves upon the former produce upon the under face of the plate the ribs D. The plate is then reversed or'turned over and returned between the rolls B and C, so that the ribs C and intermediate grooves upon the latter depress the plate upon the lines intersecting the *ribs D thereon to form the utmost simplicity in structure, from which an absolute and effective result may be secured in the wearing-face of the plate.

It will be apparent that the objects of this invention could be accomplished in some degree by a modified arrangement of the rolls, as shown in Fig. 5, in which the grooved roll E is adapted to cooperate with the plain or smooth roll E above the same to effect the primary operation for producing the ribs 1) upon the plate, while the secondary action or depression of these ribs may be effected by the oppositelygrooved roll E cooperating with the plain roll E said rolls being arranged to successively operate upon the plate in its passage through the mill.

It will be obvious that changes may be made in the details of construction and configuration of the means for carrying this invention into effect, the primary object thereof being the production of the diagonallydepressed rib upon the plate and the removal of this rib upon intersecting lines to produce the projection on the face of the plate without departing from the spirit of the invention as defined by the appended claims.

Having thus described my invention and set forth its merits, what I claim, and desire to secure by Letters Patent, is

1. A means for producing floor-plates, comprising a primary roll provided with grooves extending at an acute angle to its axis of rotation, and a secondary roll provided with grooves at an acute angle to its axis of rotati on and extending in an opposite direction to the grooves upon the primary roll.

2. A means for producing floor-plates, comprising primary and secondary rolls grooved in opposite directions at an acute angle to their axes of rotation, and an intermediate plain roll.

3. The means of producing floor-plates, comprising a primary roll provided upon its periphery with means for producing a series of parallel ribs upon one surface of the plate and extending diagonally to the sides thereof,

and a secondary roll provided upon its periphery with means for removing portions of said ribs to leave a series of projections upon the face of said plate.

In testimony whereof I affix my signature in presence of two witnesses.

MASON Gr. WORTH.

Witnesses:

ELMER E. VVoR'rH, R. E. CoNNnLL. 

